class_docstr: A version of HolisticBiasTeacher that sets a context string that OPT-based models
  will be familiar with.
code: def __init__(self, opt, shared=None):
      if opt["use_blenderbot_context"] is True:
          raise ValueError(
              "If you want to use BlenderBot-style context strings, use the base HolisticBiasTeacher."
          )
      self.id = HOLISTIC_BIAS_OPT_CONTEXT_TASK
      super().__init__(opt, shared)
  
file_path: ParlAI/projects/bb3/holistic_bias/scripts/eval_175b_model.py
imports: from holistic_bias.run_bias_calculation import EvalModelOnHolisticBias, HolisticBiasTeacher
  from holistic_bias.src.bias_measurements import BiasMeasurementCompiler
  from parlai.core.teachers import register_teacher
label_desc: Use image node_id 1 to create a new HolisticBiasOptContextTeacher object from inherited base classes: HolisticBiasTeacher with example: obj = HolisticBiasOptContextTeacher(opt, shared)